Conical balance-valve of steam-engines



ACri

y UNI- THOMAS MCDONOUGH, OF MIDDLETOWN, CONNECTICUT.

CONICAL BALANCE-VALVE OF STEAM-EN GINES.

Speccation of Letters Patent No. 3,437, dated February 12, 1844.

To all whom t may concern Be it known that I, THoMAs McDoN- onen7 ofMiddletown, in the county of Middlesex and State of Connecticut, have invented a new Valve `to be Applied to Steam Engines, whereof thefollowing is an exact description.

Desciz'ptz'on of single balance @aloe-The nature of my inventionconsists in connecting the conical (a) valve with the well known balancepiston (o) by means of a hollow stern (c) so that the steam can passthrough 'the hollow stem to act below the balance piston, and thus havealways an equal pressure on the upper side of the valve and lower sideof the piston, and on the p lower' side of the valve and upper side ofthe piston. The valve to be placed as usual in a chest and the piston ina cylinde (el) either above or below the conical valve,

That I claim as my invention and desire to secure by Lett-ers Patent asan improvementon the well known conical balance valve, is

Connecting the valve with the balance piston by means of a hollow stemas herein describe THOMAS MCDoNoUGH.

Witnesses Rom'. A. BAKER, H. H. PRENTISS.

